Knob attachment.



UNITED STATE-sf PATENT (rmer.A

HERBERT wnavrsor FALL RivnR, MAssAonusETrs KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 629,123, dated July 18, 1899.'

v Application iled May 4,1899. Serial No. 715,528. (No modeh) To @ZZ whom, it may concern:

Be it known that I, HERBERT W. Davis, of

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of Massachusetts,'have invented anew and useful Improvement in Door-Knob Attachments; and I hereby declare that the following is a full, clear, and eXact description of the same, reference being had to the accompanying drawings,lforming part of this speciication.

This invention has reference to an improvement in the class of door-knob attachments in which the door-knobs are secured to a spindle extending through the lock, which spindle is supported in a rose secured to the 0pposite sides of the door. j p p The invention consists in the peculiar and novel construction'of sockets rotatably supported in the roses on the opposite sides of the door and in knobs secured to the spindle and'held in position by coiled springs contained inl the sockets and the friction-bearings in the post between the' sockets and the; rosesas will be more fully set forth hereinafter.

Figure 1 is an 'edge view ot' a door provided with a latch having door-knobs secured by my improved door-knob attachment. Fig. 2 is a side view of part of a door, the door-knob attachment being shown, partly in section, on the lineB B ofFig. 1. Fig. 3 is a transverse section of a view on the line C C of Fig. l, showing the construction of my improved door-knob attachment. Fig. 4 is a sectional view on the line A A o'- Fig. 1,.,showing the antifriction-bearin g of the sleeve on the rose. Fig. 5 is an end'view of one of the sockets.

In the drawings, ct indicates the door; -b b, the roses secured to the opposite sides of the door; b b', annular disks secured to the outer ends of the roses, and c sockets having the outwardlyjproj ectin g flange c and the bottom of the cup-'shaped socket provided with the rectangular hole c?. .The series of balls o3 form the antifriction-bearing between Vthe socket c and the rose b. The said series of balls are held in position by anlinner iiange'b2 on the rose and the ange c' yonthe socket c. Within the sockets c c are placed the coiled springs d d. The spindle d', which extends through the two sockets and through the tumbler e of the latch e", is secured to the knobs d2 d2 by screws in the usual manner against the pressure of the compressed coiled spring d in the sockets c c. The spindle d is of such (preferably rectangular) form as will tit the rectangular holes c2 o2 in the sockets c c and the rectangular hole in the tumbler e of the latch,- By this construction the sockets c turn with `the spindle CZ and with the knob d2 on the antifriction-bearing c3 intermediate the sockets A and the roses, and thereby give to vthe 'rotatable spindle a support of considerably greater diameter than the spindle and of considerably greater diameter than the diameter of the shank of the knobs.

The knobs having their shanks extending into' the sockets, as shown in Fig. 3, rotate with the sockets, and as the coiled springs CZ d bear against the shoulders ofthe sockets on the knobs these knobs are firmly held against sagging and wear and are not liable to get loose, sag, or wabble.

The latch or lock forms no part of this invention,-and 'any of the ordinary forms of latches or locks may be used or, if required,

may be adapted for use in connection withl the door-knob Vattachment when only one door-knob is required only one rose h and one rotatable socket c may be used, and when so 4used the extended base, forming the antifriction-bearing for the socket, Y"the spindle, and the knob, secures a rigidity not'found in prior structures and facilitates the operation of the lock. w

"Having thus described my invention, I claim as new and desire to secure by Letters Patentp Y 1'. In a door-knob attachment, the combination with the spindle operating thelatch and the door-knob, of a socket connected with the spindle, an outwardly-projectin g, annular flange on the socket, a rose provided with an inwardly-projecting, annulaniiange, and a series of balls forming anantifriction-bearing for the socket in the rose; whereby the socket, the :spindle and the door-knob rotate together on an' extended base, substantially as described.

4 2. In a door-knob attachment, the combination with the spindle d', the knobs d2 d2,

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nleans for securing the knobs to the spindle, tended, annulatbase formed bythe ball-bea- 1o and the coiled springs d, of the sockets c exings, as desoibed. loendng over the shanks of the knobs and se- In Witness whereof I have hereunto set my cured to Iche spindle, the outWardly-extendf hand.

5 ing flanges o' c on the sockets, the roses b b,

'the annular disks ZJ b secured to the roses, HERBERT XV DAVIS and the series of balls c3 c3; Wherebythe knobs `Witnesses are firmly secured to JLahe spindle,V and the spin- J. A. MILLER, J 1*.,

dle, sockets and knobs are rotated on an eX- B. M. SIMMS. 

